Problem with O2 sensor using defouler

yoefg08 · 07-03-2009, 06:06 PM

Hi,
I have 08 siand I just made the installation of my vibrant w/hfc header with strup defouler yesterday. Everything goes right but today the check engine came out. I went to autozone and after put the car code reader, the problem was the O2 sensor. How can I have problem with this sensor if I am using a defouler? and what can I do??
thanks

***JEA86*** · 07-03-2009, 06:11 PM

it can still trip the sensor. mine did

humboldt1498 · 07-03-2009, 06:24 PM

Why even run a defouler? I have a vibrant header w/hfc with no defouler and have never thrown a cel and I have put over 15K on my car since the header.

Zeuceone · 07-03-2009, 06:27 PM

i wouldnt use a defouler if it has a HFC. take the defouler off and just put the 02 sensor on without it.

***sivtecboi80*** · 07-03-2009, 08:20 PM

Hey i been hAVINin the same problem with mine i ran a random tech cat with vibrant exhuast for the longest time with no problems and no i have the vibrant heade rwith cat and angled defouler and been cel light

Zeuceone · 07-03-2009, 08:21 PM

what????

NewBernSI · 07-03-2009, 08:22 PM

I have a CEL every once in a while. Strup. I just reset the ECU and usually doesn't show up for a while. Usually comes on when it's raining a lot.

cuzzybubba1 · 07-04-2009, 09:53 AM

Quote:

Originally Posted by sivtecboi80

Hey i been hAVINin the same problem with mine i ran a random tech cat with vibrant exhuast for the longest time with no problems and no i have the vibrant heade rwith cat and angled defouler and been cel light

rileyrat · 07-04-2009, 10:08 AM

Anyone running a HFC shouldn't need the defouler. You have to consider how a defouler works, chances are the HFC+defouler are putting you back out of an acceptable range for the ECU.

Plus if the defouler wasn't done right to begin with (some require drilling) then that could again be the issue for those running a RH with a defouler.

***sivtecboi80*** · 07-04-2009, 11:29 AM

the angled strup defouler doesnt need drilling comes all set to screw in the factory 02 bung however I beleive you to be right rileyrat its not getting a right reading so i will try taking it off and just running it without the defouler to see how that plays out thanks

yoefg08 · 07-06-2009, 08:05 PM

Well, I took off my defouler and my problem with the O2 sensor is gone. So, never use a defouler with vibrant w/ hfc.
thanks for your tips.

**obert** · 07-06-2009, 08:15 PM

I think it just depends on luck,I have a random tech high flow cat with a home made defouler and have had no problems. Some other people have problems and some dont so yea its just luck.....................LOL

DeePStr33tzOfTn · 07-06-2009, 09:40 PM

about once a month i get a CEL because of my test pipe, i have a strup angled defouler on it. it always says "slow response secondary 02 sensor"

07-03-2009, 06:06 PM	#1 (permalink)
yoefg08 Member Join Date: Sep 2008 Posts: 38	Problem with O2 sensor using defouler Hi, I have 08 siand I just made the installation of my vibrant w/hfc header with strup defouler yesterday. Everything goes right but today the check engine came out. I went to autozone and after put the car code reader, the problem was the O2 sensor. How can I have problem with this sensor if I am using a defouler? and what can I do?? thanks
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07-06-2009, 08:15 PM	#12 (permalink)
obert Admin Ninja Join Date: May 2005 Posts: 4,294,967,295 obert	I think it just depends on luck,I have a random tech high flow cat with a home made defouler and have had no problems. Some other people have problems and some dont so yea its just luck.....................LOL __________________ My Civic Feature On NW-Built

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07-03-2009, 06:11 PM	#2 (permalink)
*JEA86* Si-Onara Join Date: Jul 2007 Location: Glen Daniel WV Age: 26 Posts: 5,879 Jeremy	it can still trip the sensor. mine did

07-03-2009, 06:24 PM	#3 (permalink)
humboldt1498 Senior Member Join Date: Apr 2008 Location: Fort Collins, CO Posts: 4,800 Forrest	Why even run a defouler? I have a vibrant header w/hfc with no defouler and have never thrown a cel and I have put over 15K on my car since the header.

07-03-2009, 06:27 PM	#4 (permalink)
Zeuceone Senior Member Join Date: Nov 2006 Age: 14 Posts: 98,529	i wouldnt use a defouler if it has a HFC. take the defouler off and just put the 02 sensor on without it.

07-03-2009, 08:20 PM	#5 (permalink)
*sivtecboi80* VIP Member Join Date: Apr 2008 Location: Long Island NY Age: 31 Posts: 2,406 Nick	Hey i been hAVINin the same problem with mine i ran a random tech cat with vibrant exhuast for the longest time with no problems and no i have the vibrant heade rwith cat and angled defouler and been cel light

07-03-2009, 08:21 PM	#6 (permalink)
Zeuceone Senior Member Join Date: Nov 2006 Age: 14 Posts: 98,529	what????

07-03-2009, 08:22 PM	#7 (permalink)
NewBernSI Senior Member Join Date: Feb 2008 Location: New Bern, North Carolina Posts: 320 Mike	I have a CEL every once in a while. Strup. I just reset the ECU and usually doesn't show up for a while. Usually comes on when it's raining a lot.

07-04-2009, 10:08 AM	#9 (permalink)
rileyrat Senior Member Join Date: Jun 2008 Location: Lawton, Oklahoma Posts: 425	Anyone running a HFC shouldn't need the defouler. You have to consider how a defouler works, chances are the HFC+defouler are putting you back out of an acceptable range for the ECU. Plus if the defouler wasn't done right to begin with (some require drilling) then that could again be the issue for those running a RH with a defouler.

07-04-2009, 11:29 AM	#10 (permalink)
*sivtecboi80* VIP Member Join Date: Apr 2008 Location: Long Island NY Age: 31 Posts: 2,406 Nick	the angled strup defouler doesnt need drilling comes all set to screw in the factory 02 bung however I beleive you to be right rileyrat its not getting a right reading so i will try taking it off and just running it without the defouler to see how that plays out thanks

07-06-2009, 08:05 PM	#11 (permalink)
yoefg08 Member Join Date: Sep 2008 Posts: 38	Well, I took off my defouler and my problem with the O2 sensor is gone. So, never use a defouler with vibrant w/ hfc. thanks for your tips.

07-06-2009, 09:40 PM	#13 (permalink)
DeePStr33tzOfTn Senior Member Join Date: Jun 2007 Location: Baumholder, Germany Age: 24 Posts: 3,352 Joey	about once a month i get a CEL because of my test pipe, i have a strup angled defouler on it. it always says "slow response secondary 02 sensor"

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